I don't see how girls who like sex in these stories are supposed to get fatter. Sex is actual cardio and if they're doing it all day they're burning them calories.
@AznTHundaGod Researchers have found that sex actually burns relatively few calories, despite how much work it appears to take. 30 minutes of sex will only burn roughly 150 calories at the most.
Yes, I am pretty sure each hentai artists, who draw these kinds of fetishes, possess medical degrees to accurately portrait what they are trying to convey. I guess the idea of fantasies elude some people who seek logic in everything, especially something that is conjured up in someone's mind and then demonstrated in an art form. :-/
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